CVE-2026-39858: Traefik Http Chain Missing Deny Encoded Characterscve-2026-39858-traefik-http-chain-missing-deny-encoded-characters
The Traefik HTTP entrypoint handler chain wires `denyFragment` (and `normalizePath`) but does not install `denyEncodedCharacters` in the same chain. Without this middleware, suspicious percent-encoded characters in the URL path (e.g. %0A, %0D, %2F, %5C, %00, %25, %3B) reach downstream middleware and authentication subrequests, where they can be used to forge
